Well if you use a keyword called filter:links in your search text box you get all posts which have links. Its useful when you are searching about a news you haven't heard of (Twitter trends mostly) that is quite active: you'd have people Tweet their reactions to it most of the time, however you'd be interested in the Tweets which point to the exact news article on the web to actually learn about the news. Hence this comes in handy.

But I want quite the opposite of this. Does Twitter provide anyway to express this requirement? I tried -filter:links, needless to say it didn't work.